Performance and Influencing Factors of Iron-based Catalyst for Ortho to Para Hydrogen Conversion

Table 1. Effect of activation method on catalytic efficiency
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Table 1. Effect of activation method on catalytic efficiency
Activation ambience Activation method p-H₂content (relative value)/%
Vacuuming 110 ℃ for 8 h 100
Purging H₂ 110 ℃ for 8 h 102.26
Vacuuming 160 ℃ for 16 h 104.36
Purging H₂ 160 ℃ for 16 h 104.62

Table 2. Effect of drying temperature on catalytic efficiency and mechanical strength
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Table 2. Effect of drying temperature on catalytic efficiency and mechanical strength
Sample Drying temperature/℃ Average compressive strength of particle/N p-H₂content(relative value)/%
F3-1 110 3.27 100
F3-2 130 3.42 89.93
F3-3 150 3.51 84.17

Table 3. Effect of particle size on catalytic efficiency
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Table 3. Effect of particle size on catalytic efficiency
Sample Aperture of crushing sieve/mm Particle size/µm p-H₂ content(relative value)/%
F4-1 1.2 420~841 100
F4-2 1.0 297~595 103.72
F4-3 0.8 297~595 105.34

Table 4. Effect of concentration ratio on catalytic efficiency and mechanical strength
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Table 4. Effect of concentration ratio on catalytic efficiency and mechanical strength
Sample Concentration ratio of Fe³⁺:OH^- Average compressive strength of particle/N p-H₂ content(relative value)/%
F7 0.189 3.18 100
F5 0.328 4.14 101.93
X14 0.646 3.99 102.00

Table 5. Effect of doping element on catalytic efficiency and mechanical strength

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Table 5. Effect of doping element on catalytic efficiency and mechanical strength

Sample	Surface area/(m²·g^-1)	Pore radius/nm	Average compressive strength of particle/N	p-H₂ content(relative value)/%
FeCo_0.05O_xOH	67.315	12.85	3.30	114.79
FeCe_0.05O_xOH	204.105	4.42	3.07	120.55
FeAl_0.2O_xOH	238.322	2.84	4.75	122.91
FeCo_0.05Al_0.2O_xOH	242.901	2.97	3.43	124.44
FeCe_0.05Al_0.2O_xOH	243.463	2.91	3.62	124.94

Table 6. Comparison of particle size and catalytic efficiency for commercial catalyst and catalyst in this work at different flow rates of H₂
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Table 6. Comparison of particle size and catalytic efficiency for commercial catalyst and catalyst in this work at different flow rates of H₂
Sample Particle size, d₉₀/μm p-H₂content (relative value)/%
400 mL•min^-1 800 mL•min^-1 1200 mL•min^-1
Commercial catalyst 820.5 49.29 47.29 45.19
This work (F5) 712.1 49.46 48.05 46.49

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Na LI, Ruixiao CAO, Jin WEI, Han ZHOU, Hongmei XIAO. Performance and Influencing Factors of Iron-based Catalyst for Ortho to Para Hydrogen Conversion[J]. Journal of Inorganic Materials, 2025, 40(1): 47

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Paper Information

Category:

Received: Apr. 23, 2024

Accepted: --

Published Online: Apr. 24, 2025

The Author Email: Na LI (lina110@mail.ipc.ac.cn)

DOI:10.15541/jim20240209

Topics

laser devices and laser physics

Lasers and Laser Optics

Laser physics

laser manufacturing

Instrumentation, Measurement and Metrology

Table 1. Effect of activation method on catalytic efficiency

Table 1. Effect of activation method on catalytic efficiency

Table 2. Effect of drying temperature on catalytic efficiency and mechanical strength

Table 2. Effect of drying temperature on catalytic efficiency and mechanical strength

Table 3. Effect of particle size on catalytic efficiency

Table 3. Effect of particle size on catalytic efficiency

Table 4. Effect of concentration ratio on catalytic efficiency and mechanical strength

Table 4. Effect of concentration ratio on catalytic efficiency and mechanical strength

Table 5. Effect of doping element on catalytic efficiency and mechanical strength

Table 5. Effect of doping element on catalytic efficiency and mechanical strength

Table 6. Comparison of particle size and catalytic efficiency for commercial catalyst and catalyst in this work at different flow rates of H2

Table 6. Comparison of particle size and catalytic efficiency for commercial catalyst and catalyst in this work at different flow rates of H2

Table 6. Comparison of particle size and catalytic efficiency for commercial catalyst and catalyst in this work at different flow rates of H₂

Table 6. Comparison of particle size and catalytic efficiency for commercial catalyst and catalyst in this work at different flow rates of H₂